Add name column to posterminal table

- Added required name NVARCHAR(255) NOT NULL column to posterminal schema
- Updated SQL queries (LIST_BY_COMPANY, GET_BY_ID, CREATE, UPDATE) to include name
- Updated upsert store method to validate and persist name
- Updated README with name in method signatures and return types

src/schema.js

@@ -574,6 +574,7 @@ BEGIN
     CREATE TABLE posterminal (
         id INT IDENTITY(1,1) PRIMARY KEY,
         company_id INT NOT NULL,
+        name NVARCHAR(255) NOT NULL,
         token NVARCHAR(255) NULL,
         pairingpin NVARCHAR(50) NOT NULL,
         CONSTRAINT FK_posterminal_company FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE,